package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetMealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService{
    @Autowired
    private DishService dishService;
    @Autowired
    private SetMealService setMealService;
    //扩展自己的方法
    @Override
    public void remove(Long id){
        //构造查询条件,根据分类id查询
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(dishLambdaQueryWrapper);
        //查询当前分类是否关联了菜品，关联了就跑出业务异常
        if (count>0){
            //抛出异常
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //查询当前分类是否关联了套餐，关联了就跑出业务异常
        LambdaQueryWrapper<Setmeal> setMealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setMealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count1 = setMealService.count(setMealLambdaQueryWrapper);
        if (count1>0){
            //抛出异常
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //正常删除
        super.removeById(id);
    }

}
